Nontaxable combat pay is generally reported on Form W-2 Wage and Tax Statement in Box 12 with code "Q."
Fill out Form W-2 in your TaxAct return, and enter your Box 12 - Letter code and Amount (if you need help, go to our Form W-2 - Entering in the TaxAct Program FAQ):
After entering your Box 12 - Letter code and Amount, you need to enter your military service:
This data will then transfer to the Electronic Filing Worksheet, and will allow e-filing if the withholding is greater than 50% of the wages.